(a-b)^2>; = 0 a^2+b^2-2ab>; = 0 a^2+b^2>; =2ab
So-2ab
So the answer is -3.
a^2+b^2-ab=3-2ab
-2 & lt; =-2ab & lt; =6
So 1
M=9 m= 1
M+m= 10